Also, what are you actually trying to figure out, at a high level, with your recent questions?
– Russell BorogoveSep 7 at 23:35

If you're comparing the ratio to what would be expected by the chemical reactions, keep in mind that the Merlin engines in Falcon 9's are designed to run fuel-rich (i.e. there is a slight excess of fuel).
– Dr SheldonSep 8 at 4:32

It's not appropriate to take a ratio of numbers that have been arbitrarily rounded off and extrapolate 6 significant figures from the result, so there's no support for your 0.428571 value, and thus no conflict with the 0.4297 figure. Those figures differ only by a quarter of a percent anyway.